html{
    height: 100%;
}

  #active-user {
      height: 600px;
      background: #000000;    
      color: #ffffff;
      min-height: 600px;
    
      display: flex;
      align-items: center;
      justify-content: center;
  }

  #chat-room {
      min-height: 600px;
      background: #f5f5f5;
  }

  textarea {
      position: absolute;
      bottom: 10px;
      width: 600px;
      min-height: 120px;
      padding: 20px;

      border: none;
      overflow: auto;
      outline: none;
  }

  #chat-box {
      padding: 20px; 
  }

  #chat-message {
      background: #f8f9fa!important;
      max-width: 40%;
      min-height: 50px;
      padding: 3px;
  }